State Guide
EIN in Idaho (ID)
How to get an EIN for your Idaho business or Idaho LLC. The EIN is a federal number from the IRS. Non-residents apply by fax with a passport, no SSN required. ein.so files Form SS-4 for $49.
Getting an EIN in Idaho follows the same federal IRS process used in every state. The EIN is a federal number from the IRS, not an Idaho-specific number. Non-residents apply by fax on Form SS-4 using a passport number on Line 7b. The IRS online tool requires an SSN, so the fax method is the path for non-residents. ein.so files Form SS-4 and delivers your EIN by email. Standard costs $49 (4-7 business days). Express costs $97 (2-3 business days).
Idaho is one of the fastest-growing US states, and many founders form an Idaho LLC to run a domestic or international business. Every Idaho business that hires staff, opens a bank account, or files federal returns needs an Employer Identification Number (EIN). The EIN is a 9-digit federal tax ID in the format XX-XXXXXXX. The IRS charges $0 for it. This guide explains how to get an EIN for an Idaho business, how non-US residents apply without an SSN, and how the federal EIN differs from an Idaho state tax registration.
| Detail | Information |
|---|---|
| State | Idaho (ID) |
| State tax authority | Idaho State Tax Commission |
| LLC formation authority | Idaho Secretary of State |
| Federal EIN | Same as all states (IRS) |
| EIN cost (IRS) | $0 |
| EIN cost (ein.so) | $49 Standard / $97 Express |
| IRS EIN fax number | 855-215-1627 |
State vs Federal
Is an EIN in Idaho the Same as a Federal EIN?
An EIN in Idaho is identical to a federal EIN because the IRS issues every EIN. Idaho does not issue its own EIN. Your Idaho LLC uses the same 9-digit number that any US business uses. The number works nationwide.
The EIN is federal. Idaho state tax registration is separate. Many Idaho businesses need both. Your EIN identifies your business to the IRS for federal taxes. An Idaho permit from the Idaho State Tax Commission covers state sales tax or employee withholding when you have Idaho activity.
| Identifier | Issued by | Purpose |
|---|---|---|
| Federal EIN | IRS | Federal taxes, banking, payroll |
| Idaho state tax permit | Idaho State Tax Commission | Idaho sales tax, withholding |
| Idaho LLC registration | Idaho Secretary of State | Legal formation of the entity |
Your EIN does not replace Idaho state registration. It does not replace your LLC filing with the Idaho Secretary of State. See our state tax ID guide and EIN cost breakdown for more. Confirm your exact Idaho state obligations with a CPA, because ein.so does not give tax advice.
Non-Residents
Can a Non-US Resident Get an EIN for an Idaho LLC?
Yes. A non-US resident can get an EIN for an Idaho LLC without an SSN or ITIN. You enter your passport number on Form SS-4 Line 7b. The IRS online tool requires an SSN, so non-residents file by fax to 855-215-1627. ein.so handles this for $49.
Idaho welcomes non-resident LLC owners. You do not need to live in Idaho. You do not need a US visa. You do not need to visit the United States. The EIN process is the same for a resident and a non-resident, except for the application method.
No SSN Required
Fax Filing Only
Remote From Any Country
Same EIN Format
See our full EIN for non-residents guide for country-specific notes.
How to Apply
How Do You Get an EIN for an Idaho Business?
You get an EIN for an Idaho business through the IRS in four ways: online (instant, SSN required), by fax to 855-215-1627 (4-7 days), by phone for international applicants at 267-941-1099, or through ein.so for $49. The method is identical in every state.
| Method | Speed | Cost | SSN required |
|---|---|---|---|
| Online | Instant | $0 | Yes |
| Fax | 4-7 days | $0 / $49 | No |
| Phone (international) | Same call | $0 | No |
| 4-6 weeks | $0 | No |
The IRS online tool blocks anyone without an SSN. That is why non-resident Idaho founders use fax. The IRS issues most correctly filed EINs within 4-7 business days. See our EIN processing time guide for current timelines.
Form Your Idaho LLC
Gather Your Documents
Complete Form SS-4
Submit by Fax and Receive Your EIN
For the complete walkthrough, see how to get an EIN.
SS-4 Fields
How Do You Fill Out Form SS-4 for an Idaho LLC?
You fill out Form SS-4 for an Idaho LLC by entering the LLC name on Line 1, the address on Line 4, the responsible party on Line 7a, and the passport number on Line 7b. Non-residents leave the SSN field and use a passport instead. Errors cause silent IRS rejection.
| SS-4 Field | Entry for an Idaho LLC |
|---|---|
| Line 1 (Legal name) | Your Idaho LLC name |
| Line 4 (Mailing address) | Your mailing address |
| Line 7a (Responsible party) | Your full name as on your passport |
| Line 7b (SSN/ITIN/EIN) | Your passport number (non-residents) |
| Line 9a (Entity type) | LLC, then number of members |
| Line 10 (Reason) | Started new business |
| Line 16 (Principal activity) | E.g., "software," "e-commerce," "consulting" |
The most common rejection cause for international applicants is address formatting. Foreign address formats do not map cleanly to the SS-4 layout, and the IRS rejects malformed entries without explanation. ein.so reformats addresses to an IRS-accepted style. ein.so does not give tax advice; confirm entity-type details with a CPA. See the SS-4 form guide for line-by-line help.
Banking & Payments
How Do You Use an Idaho LLC EIN for Banking and Payments?
You use an Idaho LLC EIN to open a US business bank account and connect US payment processors. Mercury, Relay, and Wise approve many non-resident LLC owners remotely within a few business days. The bank uses your EIN to identify the account for tax reporting.
US Business Bank Account
Stripe on a US Entity
PayPal Business (US)
Amazon and Marketplaces
Together, an Idaho LLC, an EIN, and a US bank account give you full access to the dollar economy from anywhere in the world.
Tax Compliance
What Federal Taxes Apply to a Foreign-Owned Idaho LLC?
A foreign-owned single-member Idaho LLC files Form 5472 with a pro-forma Form 1120 each year. The penalty for not filing Form 5472 is $25,000. Most LLCs also file a BOI report with FinCEN. These are federal requirements that apply regardless of state.
Form 5472 + Form 1120
BOI Report to FinCEN
Idaho State Filings
Federal Income Tax Treatment
ein.so handles the EIN application and does not provide tax advice. Confirm all federal and Idaho tax specifics with a US CPA. Your EIN is the starting point for US tax compliance. See our EIN without SSN guide and EIN for non-residents.
Comparison
How Does ein.so Compare to Getting an EIN Yourself?
ein.so compares to the DIY method on speed, error handling, and access. The IRS charges $0, but non-residents cannot use the instant online tool. ein.so prepares Form SS-4 correctly, faxes the IRS, and tracks the result, removing the rejection risk that delays DIY filings.
| Factor | DIY by Fax | ein.so Standard | ein.so Express |
|---|---|---|---|
| Price | $0 | $49 | $97 |
| Speed | 4-7 days if error-free | 4-7 business days | 2-3 business days |
| SS-4 preparation | You complete it | Done for you | Done for you |
| Address reformatting | Manual | Included | Included |
| Rejection handling | You restart | Managed | Managed |
| Need for SSN | None (fax) | None | None |
The DIY path works when your Form SS-4 is flawless. A single address or entity-type error triggers a silent IRS rejection, and you restart the 4-7 day wait. ein.so removes that risk. We also offer an ITIN service ($197 Standard / $297 Express) for founders who later need an individual taxpayer number. Apply for your EIN — $49.
Next Steps
After Getting Your EIN in Idaho
- Open a US bank account — Mercury, Relay, and Wise accept non-resident LLC owners
- File your BOI report — required for most LLCs, filed with FinCEN
- Set up payments — connect your EIN to Stripe, PayPal, or Amazon
- File Form 5472 — annually for foreign-owned LLCs ($25,000 penalty for non-filing)
- Register Idaho state taxes — check the state tax ID guide and confirm with a CPA
Other state guides: Nebraska | Hawaii | New Hampshire | Maine. Browse all on EIN by State. New to the process? Start with how to get an EIN and EIN without SSN.
Frequently Asked Questions
Is an Idaho EIN different from a federal EIN?
No. The EIN is a federal number issued by the IRS. It is the same 9-digit number (XX-XXXXXXX) regardless of which state you operate in. Idaho does not issue its own version of an EIN. Your Idaho LLC uses the same federal EIN that a Texas or Florida LLC would use.
How do I get an EIN in Idaho?
Apply through the IRS in four ways: online at irs.gov (instant, SSN required), by fax to 855-215-1627 (4-7 days), by phone for international applicants at 267-941-1099, or through ein.so. ein.so files Form SS-4 by fax for non-residents at $49 Standard (4-7 business days) or $97 Express (2-3 business days).
Can a non-US resident get an EIN for an Idaho LLC?
Yes. A non-US resident can get an EIN for an Idaho LLC without an SSN or ITIN. You enter your passport number on Form SS-4 Line 7b instead of an SSN. The IRS online tool requires an SSN, so non-residents file by fax. ein.so handles this filing for $49.
Does Idaho have a state tax ID separate from the EIN?
Yes. Idaho issues its own state tax registration through the Idaho State Tax Commission. This is separate from your federal EIN. You may need both: the EIN for federal tax reporting and an Idaho permit for state sales tax or withholding if you have Idaho activity. Confirm your obligations with a CPA.
How much does it cost to get an EIN in Idaho?
The EIN is free from the IRS ($0). ein.so charges $49 Standard or $97 Express for non-residents who cannot use the IRS online tool. Forming an Idaho LLC with the Idaho Secretary of State carries a separate state filing fee. Confirm the current Idaho LLC fee on the Secretary of State website.
Do I need an SSN to get an EIN for my Idaho business?
No. You do not need an SSN to get an EIN for an Idaho business. The IRS online tool requires an SSN, but the fax method does not. Non-residents enter a passport number on Form SS-4 Line 7b. ein.so files the fax application and delivers your EIN by email for $49.
How long does it take to get an EIN in Idaho?
Through ein.so, Standard processing takes 4-7 business days ($49) and Express takes 2-3 business days ($97). The IRS online tool is instant for applicants with an SSN. The DIY fax method takes 4-7 business days when Form SS-4 is error-free. See our EIN processing time guide for details.
What forms does a foreign-owned Idaho LLC file each year?
A foreign-owned single-member Idaho LLC files Form 5472 with a pro-forma Form 1120 each year. The penalty for not filing Form 5472 is $25,000. Most LLCs also file a BOI report with FinCEN. These are federal requirements. Work with a US CPA on Idaho state filings and federal returns.
Can I open a US bank account with an Idaho LLC EIN?
Yes. You can open a US business bank account with an Idaho LLC EIN, your formation documents, and a passport. Mercury, Relay, and Wise approve many non-resident LLC owners remotely. The bank uses your EIN to identify the account for tax reporting. See our EIN for a bank account guide.
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